Explosive.



To all! whom it nmy concern:

SPECIFIOATIGN forming port of Letters ZQetent No. 656,225, dated May 22, 1900. Application filed August 19, 1896. Qerial No. 603,254 (No specimens.)

Be it known that 1, MAX BIELEFELDT, doc-- tor of philosophy, o subject of the German Emperor, residing at Wittouberg, in the Kingdom of Prussia, German Em piro, have invented certain new and useful Improvements in Explosives; and I do hereby declare the following to be a full, clear, and exact description of the invention, such .ns will enable others skilled in the art to which it apportains to make and use the some,

Various explosives which contain sodium nitrate and potassium nitrate are characterized by the fact that they can he exploded by the more flame of a fuse. This circumstance renders explosives of that'kindpf which blasting-niter0r blosting-soltpeter, blastingpowder,ond iit-hotrite Here the most importent representatives, especially suitable for many mining 0perati0ns,while they have also the advnn tagoof being very cine en, Those explosives have, however, the diszidvsntsge of readily becoming moistand cf'notbeing sufiicientlypowerfulfor manypnrposes. Both of these drawbacks are obviated by the new explosive, the manufacture of which forms the subject of the presentinvention. The constit uonts of this explosive are sodic saltpeter, potossic saltpeter, sulfur, coal-tar, and bichrcmate of potash. The quantitative proportions of these constituents may vary accord ing to the requirements in each case, the sole condition being that sodium nitrate should form the chief component of the constituents of the explosive which give ofi oxygen. instcod of cool-tar, or together with it, there may also be employed resins and also fatty dryingoils, loos, and varnishes. For the po tassium bichromote may also be substituted other bichromotes and also chromatcs, permongenates, and nmngonates.

For the production of :1 particularly effective explosive the following proportions of ingredients have been found suitable: sodio;

soltpcter, one hundred parts; potassic saltpeter, 7.2 ports; sulfur, 1&5 parts; 002tl-tll, 21.7 ports; potassium hichronmte, IL igin-ts.

The process is carried out as follows; The ground or otherwise cominiuutoil constitucuts after being mixed together are more or less compressed between hosted plates or rolls. When the pressure is so fliciontly great, the simultaneous hontinginay be omitted,- cspociollyovhcn the mixture has been previously moistened or when adhesive agents have been employed. By this means there is obtained a. coherent mass which can be f urther treated in any desired manner.

The advantage of the explosive produced as above described over blasting-.niter, blasting-snitpetcr, hi sting-powder, and lithotrite consists in its great resistance to moisture and also in its consadcroblyhigher blasting or bursting action, which can be increased up to one and a half times that of the older explosives with considerably-better gaseous oxplosion.

Having now particularly described and ascertained the nature of thisinvention'ond in "what manner the some is to he performed, I declare that what I claim is-- 1 1. An explosive compound consisting of sodium nitrate, potassium nitrate, sulfur, coaltor,ond potassium bichronuiio, all compressed us described.

2. An explosive compound consisting of sodinni nitrate, potassium nitrate, sulfur, coal.- tar and potassium bichroinate', the proportion of sodium nitrate being greater than the fig gregete of all the other ingredients, all con.- presscd as described.

I In. testimony whereof I have affixed my signature in. presence of two witnesses.

MAX BEELEFELDT Witnesses:

A. on Bois-Ruvi oun, J. EPHRAIM. 

